Heel cover trimming machine



M. H. BALLARID ET AL 2,M3,2

HEEL COVER TRIMMING MACHINE 4 Sheets-Shet 1 Filed June 15, 1932 I I I I Sept. l? M B A AL I IE1 H HEEL COVER TRIMMING MACHINE Filed June 13, 1932 4 Sheets-Sheet 2 M. H. BALLARD ET AL 11W? HEEL COVER TRIMMING MACHII IE V Filed June 15, 1932 Sheets-Sheet 3 EW M. H. BALLARD ET 1. flmwm HEEL COVER TRIMMING MACHINE Filed June 13, 1932 4 Sheets-Sheet 4 WNJW Patented Sept. 3, 1935 z oiaerz 2,013,022 HEEL COVER TRIMMING MACHINE Milton H. Ballard, Beverly, Earl A. Bessom, Marblehead, and Norwood H. Knowlton,

Mass, assignors to United Shoe Corporation, Paterson,

New J ersey Rockport, Machinery N. .l., a corporation of Application June 13, 1932, Serial No. 616,928

bodied in a machine for skiving the projecting marginal portions of'covers attached to heels. v i In the manufacture of shoes it is customary to cover heels such, for example, as Wood heels of. Womens shoes prior to attaching the heels to their respective shoes. In covering such heels a cover which consists of a single piece of covering material, is adhesively secured to the rear and the side surfacesof the heel the cover being larger than the surfaces so that its marginal portions projectbeyond the breast and the attaching faces of the heel. After the coverhas been cemented to the rear and side surfaces of the heal :the projecting marginal portions of the cover are inturned upon and are secured to the breast and the attaching. faces of the heel respectively. In order that the marginal portions of the cover may conform to and form a smooth surface with the breastof the heel so that such portions will not be noticeable when the breast cover or flap has been cemented to. the breast of the heel it is customarytotrim material from the outside surface of each of the inturned' marginal portions by skiving cut starting just within the breast edge and terminating in a feather edge. The marginal portion of the cover inturned upon the attaching face of the heel is also skived in like manner in order to insure that that the uncovered central part'of the attaching face of the heel may readily be forced into en' gagement with the convex heel seat during the hcel attaching operation. 1 When the marginal portions of the cover are skived as above described rough outer surfaces'to which the breast flap may be effectively cemented or by which the heel may be attached more securely to the shoe upper are I formed.

g It is an object of this invention to. provide a machine which maybe used quickly and eiiectively to skive the projecting marginal portions of covers attached to and projecting beyond heels to a predetermined width prior to cementing such portions tothe heel. 1 5

With the above object in view and in accordance with afeature of this invention the illustrated machine is provided with a cutter, mechanism positioned adjacent to the'cutter and constructed and arranged to feed a projecting marginal portion of a. cover attached to a heel against the cutter, and means illustrated as gages for guiding the heel and'the projecting marginal por-.

tlon of its coverrelatively to said mechanism and past the cutter. to skive the marginal portion. In

26 Claims. (01. 12-42) the illustrated construction the projecting marginal portion of the cover is 'fedby a-pair of driven feed rolls against the cutter, which is of the rotary disk type and has its cuttingedges disposed diagonally across anopem'ng formed between the rolls, one of the rolls being yieldably movable under pr'essurelof'the cover toward and away from the other for varying the width of the opening in accordance with the thickness of the cover upon which the machine is operating. The .heel may be so positionedand guided by the gages relatively to the feed rolls that the projecting marginal portion of its cover is trimmed substantially to the width of the feed rolls by a skiving out which removes material from'the grain side of the marginal portion and starts adjacent to the heel and gagement with a covered face of the heel and a convex end surface of the lower roll shaped and arranged to engage the face of the heel beyond which the marginal portion of the cover projects. The machine is also provided with a swinging gage arranged for engagement with the heel face which engages'the convex end surface of the roll and adapted to cooperate with the elongated gage in guiding the heel and the projecting marginal portion of its cover relatively to thefeed rolls until the convex end surface of the lower feed roll becomes effective as a guiding surface. Such an arrangement enables the operator accurately and quickly to move the heel into engagement with the convex face of the feed roll, which is hidden from view of the operator by the marginal portion of thecovering to be trimmed, without having to feel for such face. I

It is desirable to trim the projecting marginal portions of the cover to a constant Width although the cover ,material may vary in thickness and with this in view the rotary disk cutter is angularly adjustable in response to the movement of one of thelfeed rolls relatively to the other,

such movement being caused by variations in the chine in accordance with a further feature of the invention is. provided with a support p0s1- tioned adjacent to the opening formed between the rolls and constructed'and arranged to bend the marginal portion across the cutting edge of the cutter. The support has the form of a freely rotatable disk which overrides the rotary disk cutter and also serves as a chip disposing member to prevent portions trimmed from the cover and coated with cement from being deposited upon the cutter.

In the drawings,

Figs. 1, 2 and 3 are front, side and plan elevational views respectively of the illustrated machine;

Fig. 4 is a perspective view showing a heel the marginal portions of the cover of which are being skived to a predetermined width in the illusirated machine;

Fig. 5 is a detail view illustrating the position of a heel and a cover attached thereto, with reference to cover feeding and skiving instrumentalities of the illustrated machine during the cover skiving operation;

Fig. 6 is a perspective view of a heel the projecting marginal portions of the cover of which have been skived to a predetermined width in the illustrated machine.

The illustrated machine is described with reference to the skiving of the projecting marginal portions 29 of covers 22 cemented to wood heels 24. In covering such heels the cover, which may be made of leather or of any other suitable material, is applied to the side and to the rear faces of the heel, the cover being larger than such faces and extending eyond the attaching and the breast faces 25, 28 respectively of the heel. In covering heels it is customary to inturn the projecting portions 20 of the cover upon the breast and the attaching faces respectively of the heel and then to skive to a feather edge, for

reasons above explained, the marginal portions of the cover.

In order to skive the projecting marginal portions 29 of the cover the illustrated machine is provided with a rotary disk cutter or knife 39, upper and lower positively rotated feed rolls 32, 34, respectively constructed to force the projecting marginal portion 20 of the cover attached to the heel against the cutter 30, and a gage 35 arranged to engage the covered face of the heel and to cooperate with a convex end portion or heel engaging face 31 of the lower roll 36 to position the heel and the projecting marginal por" tion of its cover relatively to the feed rolls and to the cutter. The above mechanism, together with other work-guiding elements, will later be described in detail.

The operative parts of the machine are supported upon a main frame 38, which may be bolted to a work table, not shown, and includes a standard 4!) to which an electric motor 46 may be secured by bolts 42. Power is supplied to the feed rolls 32, 34, the rotary disk cutter 3i), and a rotary grinder 48 for sharpening the cutter through a vertically disposed counter shaft 56 which is journaled in upper and lower bearings 52 supported by the main frame and is driven through a belt 56 by a pulley 5t mounted upon a shaft of the motor 46.

The feed rolls 32, 34 may be secured to or may be formed integral with upper and lower shafts 58, 68, respectively, which are rotatably mounted and are positively driven, the upper shaft 58 being journaled in bearings 52, 64 (Fig. 2) rigid" ly secured to an adjustable portion 68 (Fig. 2) of the main frame and the lower shaft 68 being journaled in front and rear housings 58, it, respectively, both of which are movable relatively to the adjustable portion 66 of the main frame to cause the lower roll 34 to swing toward and away from the upper roll 32 for reasons which will be explained later.

The feed rolls 32, 34 may be adjusted as a unit toward and away from the cutter 30, together with the adjustable portion 66 of the main frame, since such portion is mounted for angular adjustment about a pin 12 (Fig. 2) passing through the adjustable portion 66 and secured to a stationary part of the main frame. Adjustment of the portion 66 relatively to the stationary main frame may be readily effected by releasing a clamp screw M, which is in threaded relation with the adjustable portion 66 of the main frame and passes through an arcuate slot 16 in the stationary part, and by then turning a screw 78 rotatably mounted in the stationary part of the main frame and in threaded relation with a lug 80 (Fig. 3) pivotally attached to the adjustable portion 66.

In order to provide for feeding covers of varying thickness against the rotary disk cutter 30 the lower roll 34, which when the machine is inoperative is normally spaced from the upper roll 32 by a distance slightly less than the minimum thickness of the covers to be operated upon, is yieldable away from the upper roll 32 under pressure of the cover during the skiving operation.

This is effected by mounting the front housing 68 for vertical movement in a slideway 82 of a pedestal 84 carried by the adjustable portion 65 of the'main frame and by rotatably supporting the rear housing 50 from a cylindrical projection 86 (Fig. 3) which is also mounted in the adjustable portion 66 of the main frame. The shafts 58 and 66 which, it will be noted, are inclined to each other to facilitate the feeding of work to the machine, are driven from a vertically disposed shaft 88 mounted for rotation in spaced bearings 98 (Fig. 2) of an upstanding bracket 92 of the adjustable portion 66 of the main frame. A pair of bevel gears 94 and 96 constructed and arranged to mesh with gears 98, I00, respectively, mounted upon the vertical shaft 88, are keyed to the shafts 58 and 60 respectively, the shaft 83 being driven by a pulley I82 which receives power from a belt I04 in driving relation with a pulley I06 of the counter shaft 50.

As above stated, in trimming the projecting marginal portions 20 of covers attached to heels it is desirable that the covers be skived to a uniform width and that the skive shall start at portions slightly removed from the breast edges E08 (Fig. 6) or the rim H0 of the heel over which the covering is turned in order that the skiving cut may not be visible in the finished shoe. With this in view the convex face 31 of the feed roll 34 and the gage 36 are constructed and arranged to position the edge beyond which the projecting marginal portion 26 extends slightly away from the cover-engaging faces of the feed rolls 32, 36.

It will be noted that the cover-engaging faces of the feed rolls 32, 34 are of equal length and of frusto-conical shape, the width of the skived marginal portion being equal to the length of the faces of the feed rolls since the cutting edge H2 of the rotary disk cutter 30 which is positioned adjacent to the openings formed between the rolls 32, 34 extends from an upper outer edge I M to a lower inner edge H6 (Fig. 5) of the opening. By providing feed rolls 32, 34 of frusto-conical shape the inner portions of the rolls travel slightly faster than the other portions of the rolls and tend to pull the heel into engagement with the aoi 3 ,022:

convex surface 31 and also tend to. iron out any wrinkles formed in the projecting marginal portion 2d of the cover, The feed rolls 32, 34, however, if desirable, may be cylindrical or of various other shapes according to the work. being operated upon in the machine.

In order that the cutting edge N2 of the cutter 3% may extend from the upper outer edge IM to the lower inner edge H6 of the opening as the roll 3 is moved toward and away from the r011 62 by varying thicknesses of covering material being skived. the rotary disk cutter'3ll is mounted for adjustment about the axis of a shaft H8 (Fig;

I) an extension of which axis extends through the upper outer edge H6. I The adjustmentof the cutter 30 about the shaft I I8 is automaticallyeffected by pivotally connecting an angular offset arm I 28 (Fig. 2), which is journaled in the pedestala i at I22, to thefront housing 68; The arm I26 at itsupper end carries an adjustable screw H4 which engages a face I26 of a curved arm I28 mounted upon a pin I36 which is pivotally supported in a bearinghousing' I32. The forward end of the arm I28 is bifurcated and includes a roll I34 extending from a cutter carrying bracket I36 mounted upon the shaft II 8.

The cutter carrying bracket I36 is normally held in a raised position by a spring I38 the lower end of which is attached to a screw secured to the bracket I36 and the upper end of which engages a shaft I66 secured to the frame of the machine. The lower feed roll 34 is normally urged toward the feed roll 32 by the tensionspr'ing I33'operating through the above-described mechanism, the feed rolls being normally spaced at a minimum distance apart, such distance, as above stated, being slightly less than the minimum thickness of heel'covers to be skived. Movement-oi the roll 54 toward the roll 32 is limited by a screw M2 (Fig. 2) which is adjustable relatively to the machine frame to vary the extent of movement of the roll 36 under the action of spring I38 toward the feed roll 32. The angularity of the cutting edge. I I2 of thecutter with respectto the opening may be initially varied byturning the screw I24 thereby adjusting the cutter 35 about the of the shaft H8. v

The cutter as may be raised or lowered rela- I tively to the cutter-carrying bracket I36 by mov-,

ing a shaft 'I ldsecured'to the cutter 30 lengthwise of its axis of rotation through mechanism such as is used in various other machines of; the Amazeen type and which will now be described briefly. The shaft I44 is rotatably mounted in upper and lower bearings I46 and I48, respectively/(Fig. l) rigidly connected to the bracket 53%; and is provided at its central portion with a collar E59 shaped for positioning within a bifurcated portion of a block I52 having'another bifurcated portion constructed to include a collar 5 5d secured to a rod I56 the lower end of which is in threaded relation with the lower bearing I48; The shaft M4 may thus be raised or lowered by turning the rod I56. The cutter 3D is rotated through a beltl58 which is in driving relation with a small pulley I 66 keyed to the shaftIM and receiving its power from a large pulley I 62 mounted upon the countershaft 56. I

The cutter (it may be conveniently sharpened by the rotarygrinder 46 mounted upon 'a shaft 564 (Fig. 1) which is supported for lengthwise adjustment in a U-shaped extension I66 of the cutter-carrying bracket I36. The grinder 48 is normally held away from the cutter '36 but may be moved into and out of engagement with the cutter by turning a knurled collar I68. The shaft I64 has secured to it a pulley I16 for receiving a. belt I12 which passes around a pulley I14 Fig. I) mounted upon the countershaft 58. The belt I12 may be tightened to drive the pulley H6 by'a beit tensioning pulley I76 mounted "for tion the heel 2 -6 and the projecting margin 26 of its covering relatively to the feed rolls 32, 34 and to the cutter 26 the illustrated machine is provided with a swinging gage I84 which is pivotally mounted ona pin I66 secured to the main frame and is normally urgedto its outward position away from the rolls by a spring I86 (Fig. 1). The front face I98 (Fig. 4) of the gage I84 is substantially in alinement with the convex face 37 of the roll 34 and constructed and arranged to cooperate with the gage 36 initially to position the heel after which the-gage I84 and the heel are swung together toward the feed rolls. Such an arrangement insures that when the attaching surface of the heel, for example, which is hidden from-the viewof the operator by the projecting marginal portion 25 of the cover is moved to the left (Fig.1) the leading portion of such surface maybe moved into contact with the heel engag ing face 3? ofthe roll 34 without theoperator having to feel for the face 31. a

In order to insure that the skiving cut will terminate at the lower inner edge I I 6 (Fig. 5) of the opening formed-betweenthe feed rolls 32, 36 and i also to insure that the end of the skive terminates ina clean cut feather edge, the part I92 (Fig. 5) of the projecting portion 26 is engaged by a cover support or rotatable disk iii which is located adjacent to the inner end of the opening and overlaps the rotarydisk cutter 36. It will be noted that the disk 6%, which is rotatably secured to a shaft I943 (Fig. 4) supported in a bushing I 68 in threaded relation with a housing 296, causes the part i 92 of the cover to be bent across thecuttingedg'e I I2 of the cutter 36 as the cover is fed against-the same. a

The rotatable disk I96 may be adjusted heightwise of the opening formed between the feed rolls 32, 34 by turning the bushing I68 in the housing 2559. The inner surface of the cover is coated with cement and as the heel and its projecting cover are moved past the cutter the rotary disk 5% also serves as a-chip ejector and insures that the chip removed from the cover shall not come into contact with and stick to the cutter. :The gage 36 extends under the rotary disk cutter 38) to insure that the side cover shall not come tions 26 of the heel cover to a predetermined width the operator after making the proper adjustments engages the covered face of the heel with the gage 35 (Fig. 4) .and moves the heel so that its attaching surface rests against the face Iilil of the swinging'gage I84. The heel and the gage H! are then moved toward the rolls 32, 34, the projecting marginal portion 28 of the cutter being fed between the rolls and the attaching face of the heel being moved into contact with the convex face 31 of the roll 34. The gage 36 and the convex face 31 are then utilized to guide the heel and the projecting marginal portion 20 relatively to the feed rolls 32, 34 and to the cutter 38 as the rolls feed the projecting marginal portion against the cutter to skive the marginal portion to a predetermined width.

Having thus described. our invention, what we claim as new and desire to secure by Letters Patent of the United States is:

1. In a trimming machine, a cutter, mechanism positioned adjacent to the cutter and constructed and arranged to feed a projecting marginal portion of a cover attached to a heel against the cutter, and means to guide the heel and the project ing portion of the cover relatively to said mechanism and past the cutter to skive said projecting marginal portion.

2. In a trimming machine, a cutter, mechanism positioned adjacent to the cutter and constructed and arranged to feed a projecting marginal portion of a cover attached to a heel against the cuttor, and gages to guide the heel and the projecting portion of the cover relatively to said mechanism and past the cutter to skive said projecting mar ginal portion.

3. A trimming machine having, in combination, a cutter, members constructed and arranged to feed a projecting marginal portion of a cover attached to a face of a heel against the cutter, and a gage to engage the covered face of the heel, one of said feed members being constructed and arranged to engage another face of the heel and to cooperate with the gage to position the heel and the projecting marginal portion relatively to the members as the members feed the projecting portion against the cutter.

4. A trimming machine having, in combination, feed members constructed and arranged to engage opposite sides respectively of a projecting marginal portion of a cover secured to a face of a heel, a cutter positioned adjacent to the feed members, and gages to engage angularly disposed faces of the heel to position the same and the projecting marginal portion of its cover relatively to the members in such manner that, as the members fee-d said portion against the cutter, the projectin marginal portion will be skived to a width equal to the length of the cover-engaging faces of the feed members.

5. In a trimming machine, a cutter, a member and a feed roll constructed and arranged to engage opposite sides respectively of a marginal projecting portion of a cover secured to a heel and to force said portion against the cutter, an elongated gage positioned adjacent to an end of the roll and extending transversely of the roll to engage the covered face of the heel, and a gage member having a surface positioned substantially in alinement with one end of the roll and constructed and arranged to engage a heel face which is angularly disposed to the covered face of the heel, said gage and said gage member being constructed and arranged to position the heel and the projecting marginal portion of the cover relatively to the cutter as the member and the feed roll force said portion against the cutter thereby to skive the projecting marginal portion.

6. In a trimming machine, a cutter, a pair of rolls to feed the projecting marginal portion of a cover attached to a face of a heel against the cutter, one of said rolls having an end surface constructed to engage a heel face above which the marginal portion of the cover projects, a gage to engage the covered face of the heel, and a member movable transversely of the axis of rotation of the rolls, said member having a surface shaped and arranged to engage said first-mentioned face of the heel for locating the heel relatively to said end surface of the feed roll.

'7. In a trimming machine, a pair of feed rolls, a cutter constructed to skive a projecting portion of a cover attached to a face of a heel and forced by the feed rolls against the cutter, and a gage positioned at one end of the rolls and overlapping the cutter to engage the covered face of the heel and to cooperate with one of the feed rolls to position the projecting portion relatively to the feed rolls and to-the cutter.

8. In a trimming machine, a cutter, means for operating the cutter to produce a draw-cut, mech" anism positioned adjacent to the cutter and constructed and arranged to feed a projecting marginal portion of a cover attached to a heel against the cutter, and gages to position and to guide the heel and its projecting cover relatively to said mechanism and past the cutter to cause the marginal portion projecting beyond the heel to be skived to a predetermined width.

9. In a trimming machine, a rotary disk cutter, rolls positioned adjacent to the cutter and constructed to feed a projecting marginal portion of a cover attached to a heel against the cutter, and gages to position and to guide the heel and its projecting cover relatively to the rolls and past the cutter to cause the marginal portion to be skived to a predetermined width.

10. In a trimming machine, a rotary disk cutter, a pair of feed rolls, and a rotary chip-disposing member positioned at one end of the rolls and overlapping the cutter.

11. A trimming machine having, in combination, a cutter provided with an elongated cutting edge, a pair of rolls for feeding a flexible cover against the cutting edge, means for operating the cutter to cause the cutting edge to move lengthwise of itself thereby to trim the cover fed by said rolls, and a rotatable disk constructed and arranged to bend portions of the cover which project beyond the rolls across the cutting edge as the cover is fed against the cutter.

12. A trimming machine having, in combination, a cutter provided with an elongated cutting edge, a pair of rolls for feeding a flexible cover against said cutting edge, means for causing the cutting edge of the cutter to move lengthwise of itself, one of said rolls being yieldingly movable away from the other, and mechanism controlled by movement of one of said rolls to adjust the cutter relatively to the rolls in accordance with the thickness of the cover being trimmed.

13. A trimming machine having, in combination, a cutter, a pair of relatively movable feed rolls constructed and arranged to receive the projecting marginal portions of covers of varying thicknesses attached to faces of heels and to force said portions against the cutter, and gages to engage a covered face of each heel and a face beyond which the cover of each heel projects to guide the projecting marginal portion of the cover in predetermined relation to the feed rolls.

14. A trimming machine having, in combination, a pair of driven rolls relatively movable transversely of their axes toward and away from each other and forming an opening to receive masaid projecting marginal rolls.

terial of various thicknesses, a diskciitter hav ingi abutting edge positioned adjacent to and ex tending diagonally across the opening formed be tween the rolls, and means responsive to the relative: movement of'the rolls in a direction trahs= verse to their I61 a'rigiilarly adjusting the cutter to insure that the cutting edge will maintaih lec'iiis'taiit relatiohwith respect to the opening as the size of the opening is changed by vary ing thicknesses of material.

15. A trimming machine having, in combination, spaced feed members constructed and arranged to engage opposite sides respectively of a projecting marginal portion of a cover secured to a surface of a heel and mounted for relative movement toward and awayfromeach other to accommodate covers of varying thicknesses, a cutter positioned adjacent to the feed members and extending diagonally of the space formed between the members, a gage to engage the covered surface of the heel, a gage to engage a face which is angularly disposed to the coveredsurface, and mechanism responsive to the relative movement of the feed members to adjust the cutter angularly relatively to the members to insure that, as the members force covers of varying thicknesses against the cutter, the cutter will be positioned to skive the projecting marginal, portion of the cover to a length equal to that of the feed members.

16. In a trimming machine, a cutter, and a pair of frusto-conical rolls mounted for rotation about axes one of which is inclined to the other and constructed and arranged to feed'the projecting marginal portion of a' cover secured to a heel against the cutter, one of said rolls having a convex end surface to engage the heel to guide portion between the 17.,A trimming machine having, in combina-' tion, a cutter, a pair of frusto-conicalrolls con-- structed and arranged to feed the projecting marginal portion of a'cover attached to a heel against the cutter, one of said rolls having an end surface to engage one face of the heel, and a gage positioned adjacent to said end surface to engage the covered face of the heel and arranged to cooperate with the end surface of the rollto position the heel and the projecting portion of its cover relatively to the rolls.

18. In atrimming machine, a cutter, a pair of rolls spaced to form an opening and constructed and arranged to feed flexible sheet material against the cutter to skive said material, and a member positioned at one end of the opening andconstructed and arranged to support a portion of the material extending beyond the rolls to insure that such portion is skived to a clean out feather edge terminating at said end of the rolls. g r

19. A trimmingmachine having, in combination, a knife provided with an elongated cutting edge, a pair of feed rolls spaced from each other to form an opening between them and constructed and arranged to feed flexible material against said cutting edge, said cutting edge being positioned diagonally of and adjacent to theopening to cause the material fed against the knife to be trimmed by a beveling out, and arotary support positioned at one side of the opening and in overlapping relation to the cutting edge, said support being constructed and arranged to bend portions of the cover which project beyond the rolls constructed andarranged to force sheet me;- i:

teriailextending between and projecting-laterally (if the rolls against the" cutter to skive said mat'e'ri'al' to a width substantially equal to the width of the rolls, and a member positioned adjacent to the opposing portions of the rolls and at one end of the same constructed and arranged to support the marginal portion of the material extending beyond the rolls and to bend such portion across the cutter to insure that the cutter will form a clean cut feather edge terminating substantially at said end of the rolls.

21. In a trimming machine, a pair of feed rolls spaced from each other to form an opening, a knife having a cutting edge positioned diagonally of the opening, said feed rolls being constructed and arranged to force sheet material drawn between the rolls and projecting laterally of the rolls against the knife to skive the material to a width equal to the length of the rolls, and a rotary support positioned adjacent to one end of the opening and overriding the knife and-constructed and arranged to bend the projecting marginal portion of the material across the cutting edge of the knife to insure that the knife will form a clean cut featheredge terminating substantially at said end of the rolls.

one of the feed rolls to position the projecting portion relatively to the feed rolls and to the cutter, and a cover-supporting ,member positioned at the opposite side of the rolls and overlapping the cutter and arranged to bend the projecting portion across the cutter and to cause material removed from the cutter to be moved away from and out of contact with the cutter.

23. In a machine of the class described, a

rotary cutter, feed rolls to force the projecting portion of a cover attached to a heel against the cutter, a gage positioned at one end of the rolls and extending beneath the cutter, and a rotary disk positioned at the other end of the rolls and overlapping the cutter.

24. In a machine of the. class described, a-

rotary disk cutter, feed rolls spaced from each other to form an opening between them and constructed and arranged to force the projecting portion of a cover attached to a heel against the cutter, a gage positioned at one end of the rolls, and a rotary disk positioned at the other end of the rolls and overlapping the cutter.

25. In a machine of the class described, a pair of spaced feed rolls constructed and arrangedto force the projecting. portion of a cover attached to a heel against the cutter, one of said rolls being movable toward and away from the other to accommodate'covers'of varying thicknesses, a-

tion the heel and the projecting portion of thecover relatively to the rolls, a rotary disk positioned at the other end of the rolls and constructed and arranged to override the cutter, and means responsive to the movement of said one roll toward and away from the-other angularly to adjust the cutter relatively to the rolls.

26. A trimming machine having, in combination, a cutter provided with an elongated cutting edge, a pair of rolls for feeding a flexible cover in a predetermined path against said cutting edge, and means for causing the cutting edge of the cutter to move lengthwise of itself, one of said rolls being yieldingly movable away from the other, and mechanism controlled by movement of one of said rolls constructed and arranged to tilt the cutter transversely of said path in accordance with the thickness of the cover being trimmed.

MILTON H. BALLARD.

EARL' A. BESSOM.

NORWOOD H. KNOWL'ION. 

